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<!DOCTYPE html> <html> <title>W3.CSS</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/lib/w3.css"> <body class="w3-container"> <h2>Hoverable Menu</h2> <p>Move the mouse over the button to open the dropdown content.</p> <div class="w3-dropdown-hover"> <button class="w3-btn w3-red">Button</button> <div class="w3-dropdown-content w3-border"> <a href="#">Link 1</a> <a href="#">Link 2</a> <a href="#">Link 3</a> </div> </div> </body> </html>